Communication board



FIG. 1 is a top, front, right-side perspective view of a communicationboard;

FIG. 2 is a bottom, back, left-side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed broken lines depict portions of the communication board thatform no part of the claimed design.

CLAIM The ornamental design for a communication board, as shown anddescribed.